Wang Donghua, 34, became the 400th hematopoietic stem cell donor in the city on Wednesday, with a 2-year-old boy, suffering fromleukemia, a recipient of it.

Wang has been a blood donor for years. In May 2016, he attended a hematopoietic stem cell donating event in Jinshan District and registered as a member of the China Marrow Donor Program. In October last year, he received a call from the Red Cross Society and was made aware thathis hematopoietic stem cells matched a baby boy.

Seeking time, Wang discussed the issue with his family and eventually gained their support. On Wednesday morning, he went through a 3-hour process at Huashan Hospital. The transplantation was carried out the same day.

"My parents first couldn't understand it because they thought the hospital would take my bone marrow for transplantation. I explained to them that the cells are from the peripheral blood and it would not harm my health," Wang said.

Donatinghematopoietic stem cells, Wang said, was like planting the seeds of hope on those who needed it.

In Shanghai, only two hospitals —Huashan Hospital and Shanghai General Hospital — offerhematopoietic stem cell collecting service. The cell transplantation process can be done at eight other places.

By end of 2017, the number of volunteers for hematopoietic stem cell had reached 427.

Wang Donghua is donating his hematopoietic stem cells at Huashan Hospital.

Wang Donghua is donating his hematopoietic stem cells at Huashan Hospital with the accompany of his wife.

A previous hematopoietic stem cell donor is talking to Wang Donghua during his donation.

Wang Donghua is donating his hematopoietic stem cells at Huashan Hospital with the accompany of his wife.